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P0420 Error code- Engine Check Light

9K views 3 replies 3 participants last post by  iana 
#1 · (Edited)
After I saw engine check light is on, scanned the car and diagnosed P0420 Catalyst Efficiency Fail B1 error code in my 2005 Hyundai Getz. I dont really understand which part is faulty and needs repair or change. Any suggestion is highly appreciated. Thank you.
I dont know service history of the car as I just bought it 3 weeks ago from a second hand car dealer.
 
#4 ·
It has to do with the O2 sensors and the catalytic converter...
could be an exhaust leak, worn out cat, or stuffed sensors, either way car needs to be taken to a shop for proper check.
I just wonder since you recently just bought it second hand, that the dealer might have cleared the codes of an existing problem
just to sell it :eek::eek::eek:, maybe take it back to them...good luck.
 
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